Rotary stem-joint.



J. NUTTALL.

ROTARY STEAM JOINT.

APPLICATION FILED JAN. 21, 1910.

0 1 9 1 2 1 r p A d 6 b n w a P J. NUTTALL.

ROTARY STEAM JOINT.

APPLICATION FILED mum. 1910.

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J. NUTTALL, ROTARY STEAM JOINT.

APPLIOATIOH FILED JAN. 21, 1910.

Patented Apr. 12,1910.

3 BHEETSSHEET 3 mmess- INVENTOR I UNITED, STATES PATENT FFTE- JAlvIESNUTTALL, 0F BURY, ENGLAND.

ROTARY STEAM-JOINT.

To all whom it may concern:

Be it known that 1, JAMES UUTTALL, a subject of the King of GreatBritain, of Park View, lValmersley Road, Bury, in the county ofLancaster, England, have invented a new and useful Improved RotarySteamJoint, of which the following is a specification.

My invention relates to apparatus wherein cylinders, or the like, areheated by means of steam admitted into the cylinder, or the like, andthe water of condensation passes out through a hollow journal, or hollowjournals, and through a port, or ports, in a head, or heads, which is,or are, hollow and carried by, and in communication with, the saidhollow journal, or journals, and controlled by covers acting as bearingpieces for the said head, or heads, and having the inlet and outletpassages connected therewith.

The principal object of my present invention is to so arrange suchapparatus that it acts as a steam trap, preventing waste of steam andinsuring a very efficient discharge of the water of condensation, aswell as presenting the advantages of external bearings which at onceshow any leakage of steam which may occur and being capable of beingtightened up while the apparatus is in operation and also of acting as asafety valve as in the case of the devices described in the aforesaidspecifications of my prior applications for Letters Patent.

According to my present invention I ar range the port, or ports, in therotatable head, or heads, for the outlet of water of condensation sothat the said port, or ports, is, or are, in communication with thewater outlet passages only at intervals. During the periods between suchintervals the said port is, or ports are, closed by coming opposite asolid part of the cover, or covers, and the steam will thus be trapped.I provide a receiver of ample capacity to hold the water ejected at eachrevolution, the outlet pipe (or pipes) leading from this receiver beingpreferably made of small diameter to check the flow of water to the mainexhaust pipe, or passage, so that the water outlet port, or ports, inthe hollow head, or heads, will pass onto the solid portion of thecover, or covers, before the whole of the water has passed from the saidreceiver and thus prevent undue rush of steam from the cylinder, or thelike.

Specification of Letters Patent.

Application filed January 21, 1910.

Patented Apr. 12, 1910.

Serial No. 539,255.

The accompanying drawing illustrates arrangements in accordance withthis invention.

Figure 1 shows the device in longitudinal section with the inlet andoutlet in the respective covers at one end of the cylinder, or the like,(parts only of the ends of which are shown). Fig. 2 is a transversesection, on the line A, B, Fig. 1. Fig. 3 shows one of the covers at oneend provided with the water outlet arrangement, the steam inlet beingthrough one of the covers atthe other end of the cylinder, or the like.Fig. 4 shows the steam inlet and the water outlet arrangements both inconnection with one of the covers at one end of the cylinder, or thelike.

At one end of the cylinder, or the like, is (in the arrangement Fig. 1)a hollow ournal 1 and fixed to this is the hollow stem 2 carrying thehollow head 3. The covers 4 and 5 act as bearing pieces for the saidhead 3. The steam inlet pipe 6, passes through the cover 5. The wateroutlet port 14 in the hollow head 3 extends only for a short distancearound the hollow head so that communication between the interior of thecylinder, or the like, and the outlet pipe 7, is established only atintervals as hereinbefore explained. The chamber 15 in the cover 4constitutes the aforesaid receiver for retaining a body of escapingwater as aforesaid. The outlet pipe 7, may be provided with a tap 16 toregulate the speed of outflow. I do not limit myself to the preciselength of the port 14, but in the drawing I have shown it as extendingaround about one quarter of the circumference of the hollow head 3, sothat, in this case, during each half rotation, the port 14 will beentirely closed, and during the other half rotation, it will begradually opening and closing as the water is being passed into thereceiver 15.

Fig. 3 shows the arrangement applied so in connection with one of thecovers at one end of the cylinder. the other cover acting simply as asupport to enable the first named cover to be held in proper position tomake a good joint. The parts are marked with the same reference numeralsas are used to denote corresponding parts in the other figures. Thesteam inlet and water outlet arrangements are in connection with thecover 5 and the cover 4 simply acts as a suport.

If desired, the arrangements Figs. 1 and 4 may be used at each end ofthe cylinder, or the like, and the water be taken up and expelled towardeach end from the mid part of the cylinder, or the like.

The covers l: and 5, in all the modifications illustrated, are connectedby bolts and nuts (preferably with the intervention of springs) theholes shown at 17 Fig. 2 being for the reception of these bolts.

Lubricating cups and stems are shown at 18 to lubricate the bearingfaces of the covers and hollow head.

I do not limit myself to the heads 3 being spherical, as they may be ofother shape which will allow of rotation and of tightening up thebearing parts.

lVhat I claim is 1. In a rotary joint of the character described, ahollow rotary stem having an outlet port, in combination with a bearingfor said stem having a discharge port adapted to communicate with saidoutlet port during only portion of the revolution of said hollow stem,whereby the latter acts as a trap during the remainder of itsrevolution.

2. In a rotary joint of the character described, a hollow rotary stemprovided with a hollow head having an outlet port, in combination with abearing for said head, having a discharge port adapted to communicatewith said outlet port during only portion of the revolution of saidhead, whereby the latter acts as a trap during the remainder of itsrevolution.

8. In a rotary joint of the character described, a hollow rotary stemhaving an outlet port, in combination with a bearing for said stemhaving a discharge port adapted to communicate with said outlet portduring only portion of the revolution of said hollow stem, whereby thelatter acts as a trap during the remainder of its revolution togetherwith a chamber of relatively large capacity into which said dischargeport opens, as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES NUTTALL. l/Vitnesses VlTILLIAM HENRY SMITH, J OHN RIDING.

